PURPOSE: To obtain a food raw material having low calorific value and high palatability, by mixing KONJAK mannan (mannan of devil's tongue), a gel- forming food material, a cellulosic material, water, an alkali metal phosphate and other alkaline agent at specific ratios and forming the mixture into pellet, etc.

CONSTITUTION: A raw material containing 1pt.wt. of KONJAK mannan, 0.5W15pts. of other gel-forming food material (e.g. potato starch) and 0W1pt. of a cellulosic material (e.g. microcrystalline cellulose) is swollen in water containing 0W0.1pt. of an alkali metal phosphate and solidified to form a gel by alkali treatment (e.g. slaked lime treatment) and heat-treatment. The objective food raw material can be prepared by cutting the mixture in the form of pellet or minced food.